The invention discloses a room-temperature gas-phase preparation method of nano confinement silver-based
quantum dot glass. Ag2S and AgInS2
quantum dots are synthesized by adopting Al2O3-SiO2 nano-pore glass in a confinement manner. The preparation method comprises the following steps: (1) mixing
aluminum lactate, tetraethoxysilane and an Ag < + > / In < 3 + > precursor, and preparing co-doped
sol by a
sol-
gel method; (2)
sintering at 600 DEG C after gradient
drying to form nano-pore aluminum-
silicon glass with the
pore diameter of 2-5nm; and (3) introducing H2S gas at
room temperature, and growing the
quantum dots in situ by utilizing a mesoporous confinement effect. In < 3 + > is introduced, the aluminum-
silicon ratio and H2S reaction time are changed, and continuous adjustment of the Ag2S quantum dots in a 980-1070 nm near-
infrared waveband and continuous adjustment of the AgInS2 quantum dots in a 620-700 nm visible light waveband are achieved respectively.
Quantum dot synthesis is achieved under the
room temperature condition, limitation of a traditional high-temperature process is broken through, the method has the advantages of being free of heavy
metal pollution (containing no Cd / Pb), simplified in process and low in cost, and a new way is provided for controllable low-temperature preparation of silver-based
quantum dot glass.